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authorKarl Berry <karl@freefriends.org>2014-12-15 00:32:38 +0000
committerKarl Berry <karl@freefriends.org>2014-12-15 00:32:38 +0000
commit26351f0bd9b48d538aebc36e9c9dfabebe5fa910 (patch)
tree25f5e900c6bb4c37927f591014d968d3d535d4e4 /Build/source/texk/web2c/alephdir/alephbis.c
parentc28c376576dc87e344cdb811e57bb1b64f1efcd8 (diff)
alephbis.c (runexternalocp): call system() somewhat more safely
git-svn-id: svn://tug.org/texlive/trunk@35825 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/web2c/alephdir/alephbis.c')
-rw-r--r--Build/source/texk/web2c/alephdir/alephbis.c35
1 files changed, 30 insertions, 5 deletions
diff --git a/Build/source/texk/web2c/alephdir/alephbis.c b/Build/source/texk/web2c/alephdir/alephbis.c
index 8366cf5c97b..a33ce435342 100644
--- a/Build/source/texk/web2c/alephdir/alephbis.c
+++ b/Build/source/texk/web2c/alephdir/alephbis.c
@@ -3,7 +3,7 @@
This file is part of the Aleph project
-Copyright (C) 1994--2001 John Plaice and Yannis Haralambous
+Copyright (C) 1994--2001, 2014 John Plaice and Yannis Haralambous
Copyright (C) 2002 Behdad Esfahbod
Copyright (C) 2002, 2005, 2006 Roozbeh Pournader
Copyright (C) 2004 the Aleph team
@@ -86,7 +86,7 @@ runexternalocp (string external_ocp_name)
for (i=1; i<=otpinputend; i++) {
c = otpinputbuf[i];
if (c>0xffff) {
- fprintf(stderr, "Aleph does not currently support 31-bit chars\n");
+ fprintf(stderr, "aleph: 31-bit chars not supported, goodbye.\n");
exit(1);
}
if (c<0x80) {
@@ -150,7 +150,32 @@ runexternalocp (string external_ocp_name)
if (out_file == NULL)
fprintf(stderr, "aleph: error opening file: %s\n", strerror(errno));
- sprintf(command_line, "%s <%s >%s\n",
+ if (strlen(external_ocp_name+1) + strlen(in_file_name)
+ + strlen(out_file_name) + 15 > sizeof(command_line)) { /* random 15 */
+ fprintf(stderr, "aleph: command line would be too long (%d): %s %s %s\n",
+ (int) sizeof(command_line),
+ external_ocp_name+1, in_file_name, out_file_name);
+ exit(1);
+ }
+
+ if (strchr(external_ocp_name+1, '\'')) {
+ fprintf(stderr, "aleph: single quote not allowed in ocp name: %s\n",
+ external_ocp_name+1);
+ exit(1);
+ }
+ if (strchr(in_file_name, '\'')) {
+ fprintf(stderr, "aleph: single quote not allowed in in file name: %s\n",
+ in_file_name);
+ exit(1);
+ }
+ if (strchr(out_file_name, '\'')) {
+ fprintf(stderr, "aleph: single quote not allowed in out file name: %s\n",
+ out_file_name);
+ exit(1);
+ }
+
+ /* ok, we've done some basic safety checks. */
+ sprintf(command_line, "'%s' <'%s' >'%s'\n",
external_ocp_name+1, in_file_name, out_file_name);
system(command_line);
otpoutputend = 0;
@@ -210,7 +235,7 @@ end_of_while:
free(out_file_name);
}
-#else
+#else /* 0 */
void
runexternalocp (string external_ocp_name)
@@ -336,4 +361,4 @@ fprintf(stderr, "Read (3) %d characters\n", n);
#endif
}
-#endif
+#endif /* 0 */